Re: New; Faraday Canopy, SAFETY reasons for grounding

>
> I have similar experiences. With fluorescent lights and so forth it's
> likely
> the problem is mid-range frequencies (dirty power, etc). At these
> frequencies
> one has to distinguish magnetic from electric, and I don't know which is
> likely the problem. If your canopy does not help it could be the magnetic
> (or both).
>
> I don't know of a good meter for this range that is affordable. The
> Stetzer meter is OK but only measures differential mode on the power
> outlets.
>
> If you find that turning off the breakers helps (although going near the
> box
> may hurt), then I'm inclined to recommend plugging the fridge and other
> offending appliances into an industrial strength power filter. Model 475
> from iceradioproducts is what I have and I do think it helps (although
> it's taken a couple weeks for me to improve, so it could be some other
> factor).
> There's another one at Filter Concepts but is more than twice the price.
>
> I do suggest getting some way to measure magnetic fields, either
> a simple buzz-stick or tri-field meter etc. Disconnecting transformers
> may
> help. Switching transformers are in everything now and make tons of dirty
>
> power. Plugging them in to a filter as I said above will help. The
> filter should
> have a dedicated ground but I have not done that yet. Even without
> grounding
> iceradioproducts is better than Stetzer, although more expensive (but a
> Stetzer
> is really limited in what it can do--but can work where you can't unplug
> the
> source, like if it's outside your house).
>
> Someone should modify a Stetzer meter to detect common mode. I guess
> one would need a ground rod and wire.
>
> Bill
>
>
> On 11/1/07, luminous_blue <[hidden email]> wrote:
> >
> > Thanks for the informative reply, Bill. It sounds like you know all
> > the technical stuff that I don't know. I might have to pick your
> > brain sometime. ;-)
> >
> > >
> > > If your problem is low frequency magnetic fields, a Faraday cage
> > > won't help (unless it's 1/2 inch thick aluminum).
> > > If your problem is high frequencies, it could help, or not if they
> > > are strong enough so that even after 30 dB shielding they are still
> > > above threshold.
> >
> > I don't know enough about electromagnetic fields to know what types
> > of frequencies bother me. But I'm bothered by flourescent lights,
> > machines/appliances (fridge, microwave, TV, computers, cordless
> > phones, cell phone, washing machine, dryer, etc.) Would those be
> > considered low or high frequency? Also, there are powerlines with
> > arcing white light & buzzing & crackling that I can hear--not too far
> > away from my apartment (I only hear it when I walk over near it--I
> > don't hear it from my place or anything). I'm not sure if those are
> > affecting me, too, or not.
> >
> > I find that my sensitivity level goes up & down--and I'm not sure
> > what causes that. At it's worst, I couldn't watch TV, couldn't go
> > within 5' of a computer, and just walking through my apartment, I was
> > feeling all the wiring in the place--through the floor, walls, etc.
> > But I haven't been THAT bad in years. Mostly, it's the
> > appliances/machines & lights that I mentioned lately. Worst is trying
> > to survive under the lights in stores & offices. There was a time
> > when even stepping into a Walmart made me so ill, I'd run right out
> > again. Now, I can just force my way through it. But it still really
> > bothers me. If I could at least get help for that, that could make a
> > difference.
> >
> >
> >
>
>